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Methanol induced hydrogen permeation through a Pd membrane
Linköping University, Department of Physics, Chemistry and Biology. Linköping University, The Institute of Technology.
Linköping University, Department of Physics, Chemistry and Biology. Linköping University, The Institute of Technology.
Linköping University, Department of Physics, Chemistry and Biology, Applied Physics. Linköping University, The Institute of Technology.
1999 (English)In: Surface Science, ISSN 0039-6028, E-ISSN 1879-2758, Vol. 442, no 2, 199-205 p.Article in journal (Refereed) Published
Abstract [en]

The dehydrogenation of methanol and the subsequent permeation of hydrogen through a 25 μm thick palladium film has been studied in a catalytic membrane reactor. At the temperature studied, 350°C, the decomposition pathway for methanol on clean palladium surfaces is believed to lead to Had and a carbonaceous overlayer. The released hydrogen can either desorb or permeate the palladium membrane. During a continuous supply of methanol hydrogen permeation is reduced and, eventually, totally quenched by the growing carbon monoxide/carbon coverage. Adding oxygen in the methanol supply can balance the increasing carbonaceous coverage through the production of carbon dioxide. In such a case, it is concluded that no CO bond scission occurs. The methanol/oxygen ratio is crucial for the hydrogen permeation rate. Isotope-labelled methanol, CH3OH, CH3OD, CD3OH and CD3OD, shows that it is preferentially the methyl (or methoxy) hydrogen that permeates the membrane.

Place, publisher, year, edition, pages
1999. Vol. 442, no 2, 199-205 p.
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-67400DOI: 10.1016/S0039-6028(99)00892-4OAI: oai:DiVA.org:liu-67400DiVA: diva2:409738
Available from: 2011-04-11 Created: 2011-04-11 Last updated: 2015-09-18

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Amandusson, HelenaEkedahl, Lars-GunnarDannetun, Helen

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